TPRCSN Barrel, 9MM, Fits P365 Fuse, TiCN, Copper TP-P365FB-XC TRUE is proud to offer its drop-in ready barrel for the Sig Sauer P365-FUSE" designed for the 4.3" P365-FUSE 9mm models. TRUE barrels deliver unmatched accuracy" combining advanced cuts" chambers" and feed ramp designed to outperform OEM standards and to ensure reliable feeding of all types of ammunition designs. Their proprietary stainless steel broach cut rifling underscores their commitment to those who demand only the best.